package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

/**
 * @author 32338
 * @date 2024-04-21 11:31:57
 * @description 订单服务层
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * @description
     ***:用户下单
     **/
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理业务异常：地址蒲为空---购物车为空---
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        Long userId = BaseContext.getCurrentId();

        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if (list == null || list.size()==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());//设置订单时间
        orders.setPayStatus(Orders.UN_PAID);//设置支付状态
        orders.setStatus(Orders.PENDING_PAYMENT);//设置订单状态
        orders.setNumber(String.valueOf(System.currentTimeMillis()));//设置订单号
        orders.setPhone(addressBook.getPhone());//设置联系电话
        orders.setConsignee(addressBook.getConsignee());//设置收货人
        orders.setUserId(userId);//设置用户Id

        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //向订单表插入多条数据
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细相关联的订单id
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertList(orderDetailList);

        //清空用户购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO =OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
       /* Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);*/

        //调用微信支付接口，生成预支付交易单
        /*JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }
*/
        //获得订单号，并且赋值到vo中


        OrderPaymentVO vo = new OrderPaymentVO();
        vo.setNonceStr(String.valueOf(ordersPaymentDTO.getOrderNumber()));
        vo.setPaySign("支付成功");
        vo.setTimeStamp(String.valueOf(System.currentTimeMillis()));
        vo.setSignType("微信支付");

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type",1);//1代表来单提醒 2代表客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号："+outTradeNo);

        //推送消息
        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);

    }

    /**
     * @description
     ***:分页查询订单信息
     **/
    public PageResult pageQueryUser(Integer pageNum, Integer pageSize, Integer status) {

        PageHelper.startPage(pageNum,pageSize);//设置分页

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();

        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        if (page != null && page.getTotal()>0){
            //查询订单，并且封装到OrderVO响应
            for (Orders orders : page) {
                Long orderId = orders.getId();//订单id

                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }

        return new PageResult(page.getTotal(),list);
    }

    /**
     * @description
     ***:查询订单详细信息
     **/
    public OrderVO details(Long id) {
        //根据id查询订单
       Orders orders= orderMapper.getById(id);

        //查询该订单的菜品/套餐明细
        List<OrderDetail> orderDetailList =
                orderDetailMapper.getByOrderId(orders.getId());

        //将订单及其详情封装到OrderVo中返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * @description
     ***:用户取消订单
     **/
    public void userCancelById(Long id) throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //判断订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态：1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        //处于待接单情况下取消需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
           /* //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额*/

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        //更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

   /**
    * @description
    ***:再来一单
    **/
    public void repetition(Long id) {
        //查询当前用户id
        Long userId = BaseContext.getCurrentId();

        //根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //将叮当响去对象转换为购物车对象
        List<ShoppingCart> shoppingCartList =
                orderDetailList.stream().map(x->{
                    ShoppingCart shoppingCart = new ShoppingCart();

                    //将原订单详情里面的菜品信息重新复制到购物车对象中
                    BeanUtils.copyProperties(x,shoppingCart,"id");
                    shoppingCart.setUserId(userId);
                    shoppingCart.setCreateTime(LocalDateTime.now());

                    return shoppingCart;
                }).collect(Collectors.toList());

        //将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);

    }

    /**
     * @description
     ***:用户催单
     **/
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //检查订单是否存在
        if (ordersDB == null ){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map = new HashMap();
        map.put("type",2);//1代表来单提醒 2代表客户催单
        map.put("order",id);
        map.put("content","订单号："+ordersDB.getNumber());

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * @description
     ***:订单搜索
     **/
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {

        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(),orderVOList);
    }

    //部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
    private List<OrderVO> getOrderVOList(Page<Orders> page){
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> orders = page.getResult();

        if (!CollectionUtils.isEmpty(orders)){//如果查询出来的结果不为空
            for (Orders order : orders) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order,orderVO);
                String orderDishes = getOrderDishesStr(order);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }

        return orderVOList;
    }

    //根据订单id获取菜品字符串
    private String getOrderDishesStr(Orders orders){

        //查询订单里菜品的详细信息
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String > orderDishList = orderDetailList.stream().map(x->{
            String orderDish = x.getName() + "*" + x.getNumber() +";";
            return orderDish;
        }).collect(Collectors.toList());

        //将该订单的所有信息拼接在一起
        return String.join("",orderDishList);
    }

    /**
     * @description
     ***:统计各个状态下的订单数量
     **/
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();

        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }

    /**
     * @description
     ***:商家接单
     **/
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        //商家接单之后我们只需要把订单信息更改就好了
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    /**
     * @description
     ***:商家拒单
     **/
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID){
            /*//支付了需要进行退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));*/
            log.info("申请退款");
        }
        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);//订单状态设置为已取消

        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * @description
     ***:商家取消订单
     **/
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception{
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();

        if (payStatus == 1){
            /*//已支付需要进行退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));*/
            log.info("申请退款");
        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * @description
     ***:派送订单
     **/
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //检查订单是否存在并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);//更改订单信息为派送中

        orderMapper.update(orders);
    }

    /**
     * @description
     ***:完成订单
     **/
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //检查订单是否存在并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }
}
